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A typical one-line diagram with annotated power flows. Red boxes represent circuit breakers, grey lines represent three-phase bus and interconnecting conductors, the orange circle represents an electric generator, the green spiral is an inductor, and the three overlapping blue circles represent a double-wound transformer with a tertiary winding.
The pattern that the line-ending words follow is often explained if the numbers 1 to 6 are allowed to stand for the end-words of the first stanza. Each successive stanza takes its pattern based upon a bottom-up pairing of the lines of the preceding stanza (i.e., last and first, then second-from-last and second, then third-from-last and third ...
The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...
Previously it was used by the IRT to designate their route that used the Astoria Line, which was originally jointly operated with the BMT prior to 1949. Additionally, it appears on the rollsigns of some trains as a green 8. [1] 9 was last used for skip-stop service on the IRT Broadway–Seventh Avenue Line from 1989 to 2005. [2]
The IRT Powerhouse An old IRT sign remains at Wall Street station. The Interborough Rapid Transit Company (IRT) was the private operator of New York City's original underground subway line that opened in 1904, as well as earlier elevated railways and additional rapid transit lines in New York City. [2]
IRT Broadway–Seventh Avenue Line (1 2 3 trains) IRT Dyre Avenue Line (5 train) ... North end/type 1: Seventh Avenue Local (all times) Broadway 2:
The IRT Eastern Parkway Line is one of the lines of the A Division of the New York City Subway. Built for the Interborough Rapid Transit Company (IRT), it stretches from Downtown Brooklyn south along Flatbush Avenue and east along Eastern Parkway to Crown Heights .
The most constant is the line, the physical structure and the tracks that trains run over.Each section of the system is assigned a unique line name, usually paired with its original operating company or division: Brooklyn–Manhattan Transit Corporation (BMT), Interborough Rapid Transit Company (IRT), Independent Subway System (IND).